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• W4306704106 abstract "Symmetries (and their spontaneous rupturing) can be used to protect and engender novel quantum phases and lead to interesting collective phenomena. In the work of K. Agarwal and I. Martin [Phys. Rev. Lett. 125, 080602 (2020)], the authors described a general dynamical decoupling (polyfractal) protocol that can be used to engineer multiple discrete symmetries in many-body systems. This work expands on the former by studying the effect of quasiperiodic and random noise on such a dynamical scheme. We find generally that relaxation of engineered symmetry generators proceeds by (i) an initial relaxation on microscopic timescales to a prethermal plateau whose height is independent of noise, (ii) a linear relaxation regime with a noise-dependent rate, followed by (iii) a slow logarithmic relaxation regime that is only present for quasiperiodic noise. We glean the essential features of these regimes via scaling collapses and show that they can be generally explained by the spectral properties of the various noise waveforms considered. In particular, the quasiperiodic noise is characterized by highly time-dependent spectrum with a noise floor that mimics white noise, and peaks that grow sharper with time. We argue that both the noise floor and peaks contribute to the initial linear-in-time relaxation while the logarithmic regime is initiated when the peaks become sufficiently well resolved and cease to contribute to further relaxation. We provide numerical evidence to justify these findings." @default.
• W4306704106 created "2022-10-19" @default.
• W4306704106 creator A5011803117 @default.
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• W4306704106 date "2022-10-18" @default.
• W4306704106 modified "2023-09-24" @default.
• W4306704106 title "Effect of quasiperiodic and random noise on many-body dynamical decoupling protocols" @default.
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• W4306704106 doi "https://doi.org/10.1103/physrevb.106.134306" @default.
• W4306704106 hasPublicationYear "2022" @default.
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